“Don’t come just to give me spirit energy as if it’s fodder” Called by a mysterious voice, unconscious Ryuusei Moriya wakes up in an unfamiliar place. It was Elman, a country in another world where dragons soar in the sky and a dragon king ruled. “According to an ancient contract, you have to live as consort to the dragon king….”, was what he was told. And then, a crimson-haired dragon king, Fei Wan, appeared before a confused Ryuusei. But what’s this, he looks like a small/little child..! Because the king is deficient of [Spirit energy] which is a life nourishment that only Ryuusei can provide through physical contact, he has degenerated and remains in a child’s form even though he’s an adult. Conspiracy over the throne, Bond between master and servant, a mysterious death in the past, a fated mate’s love!